The 100th anniversary of the 1915 road race that opened the Panama-California Exposition in Balboa Park will be commemorated by the La Jolla Regional Group of the Horseless Carriage Club of America. Between 10 and 11 a.m., race cars and horseless carriages will retrace the original course, lining up at Elliot and Rosecrans streets in Point Loma for a ceremonial start. The cars will drive one lap of the route, then head back to Balboa ...